--- a/dom/media/tests/mochitest/head.js
+++ b/dom/media/tests/mochitest/head.js
@@ -263,34 +263,46 @@ var setTestOptions;
 var testConfigured = new Promise(r => setTestOptions = r);
 
 function setupEnvironment() {
   if (!window.SimpleTest) {
     // Running under Steeplechase
     return;
   }
 
-  // Running as a Mochitest.
-  SimpleTest.requestFlakyTimeout("WebRTC inherently depends on timeouts");
-  window.finish = () => SimpleTest.finish();
-  SpecialPowers.pushPrefEnv({
+  var defaultMochitestPrefs = {
     'set': [
       ['media.peerconnection.enabled', true],
       ['media.peerconnection.identity.enabled', true],
       ['media.peerconnection.identity.timeout', 120000],
       ['media.peerconnection.ice.stun_client_maximum_transmits', 14],
       ['media.peerconnection.ice.trickle_grace_period', 30000],
       ['media.navigator.permission.disabled', true],
       ['media.navigator.streams.fake', FAKE_ENABLED],
       ['media.getusermedia.screensharing.enabled', true],
       ['media.getusermedia.screensharing.allowed_domains', "mochi.test"],
       ['media.getusermedia.audiocapture.enabled', true],
       ['media.recorder.audio_node.enabled', true]
     ]
-  }, setTestOptions);
+  };
+
+  const isAndroid = !!navigator.userAgent.includes("Android");
+
+  if (isAndroid) {
+    defaultMochitestPrefs.set.push(
+      ["media.navigator.video.default_width", 320],
+      ["media.navigator.video.default_height", 240],
+      ["media.navigator.video.max_fr", 10]
+    );
+  }
+
+  // Running as a Mochitest.
+  SimpleTest.requestFlakyTimeout("WebRTC inherently depends on timeouts");
+  window.finish = () => SimpleTest.finish();
+  SpecialPowers.pushPrefEnv(defaultMochitestPrefs, setTestOptions);
 
   // We don't care about waiting for this to complete, we just want to ensure
   // that we don't build up a huge backlog of GC work.
   SpecialPowers.exactGC(window);
 }
 
 // This is called by steeplechase; which provides the test configuration options
 // directly to the test through this function.  If we're not on steeplechase,